| No. | Item | Definition |
|---|---|---|
| 1. | analysis | careful examination or study |
| 2. | appraisal | an assessment of worth |
| 3. | argument | a reasoned point or case |
| 4. | assertion | a confident statement of belief |
| 5. | assessment | an evaluation or judgment |
| 6. | assumption | something taken as true |
| 7. | attention | focused mental consideration |
| 8. | attitude | a settled way of thinking |
| 9. | belief | something accepted as true |
| 10. | brainchild | an original idea or creation |
| 11. | brainwave | a sudden clever idea |
| 12. | brooding | anxious or gloomy thinking |
| 13. | claim | a stated belief or assertion |
| 14. | cogitation | deep or serious thinking |
| 15. | comment | an expressed opinion or observation |
| 16. | concept | an abstract idea or principle |
| 17. | conclusion | a judgment reached after thinking |
| 18. | conjecture | an opinion formed without proof |
| 19. | consideration | careful thinking about something |
| 20. | contemplation | deep, quiet consideration |
| 21. | contention | a strongly held assertion |
| 22. | daydream | a pleasant wandering idea |
| 23. | deduction | a conclusion reached by reasoning |
| 24. | deliberation | careful discussion or consideration |
| 25. | discovery | something newly found or understood |
| 26. | doubt | uncertainty or lack of conviction |
| 27. | estimate | an approximate judgment or calculation |
| 28. | estimation | an opinion or approximate judgment |
| 29. | evaluation | a judgment of value or quality |
| 30. | examination | careful inspection or consideration |
| 31. | expectation | a belief about what will happen |
| 32. | fancy | an imagined idea or whim |
| 33. | fantasy | an imagined idea or scenario |
| 34. | feeling | an opinion or emotional impression |
| 35. | flash | a sudden moment of understanding |
| 36. | forethought | planning ahead or advance consideration |
| 37. | guess | an opinion without firm evidence |
| 38. | hunch | a feeling something may be true |
| 39. | hypothesis | a tentative explanation or idea |
| 40. | idea | a notion in the mind |
| 41. | ideation | the forming of ideas |
| 42. | impression | a feeling or initial opinion |
| 43. | inference | a conclusion drawn from evidence |
| 44. | insight | a clear understanding |
| 45. | inspiration | a sudden creative idea |
| 46. | interpretation | an explanation of meaning |
| 47. | intuition | an immediate inner sense |
| 48. | judgment | an formed opinion or decision |
| 49. | logic | reasoning behind an idea |
| 50. | meditation | focused thinking or reflection |
| 51. | memory | a remembered experience or idea |
| 52. | mental image | a picture in the mind |
| 53. | mental process | an operation of the mind |
| 54. | mentality | a characteristic way of thinking |
| 55. | mentation | mental activity or thinking |
| 56. | mindset | a habitual way of thinking |
| 57. | musing | a period of reflective thinking |
| 58. | notion | a general idea or belief |
| 59. | observation | a remark or noticed idea |
| 60. | opinion | a personal belief or judgment |
| 61. | outlook | a general attitude or view |
| 62. | perception | a way of understanding something |
| 63. | perspective | a particular point of view |
| 64. | point | a particular idea or argument |
| 65. | position | an opinion or viewpoint |
| 66. | premise | a basis for reasoning |
| 67. | presumption | an assumed belief or conclusion |
| 68. | proposal | a suggested plan or idea |
| 69. | proposition | an idea offered for consideration |
| 70. | rationale | the reasoning behind something |
| 71. | reading | an interpretation of something |
| 72. | realization | sudden awareness or understanding |
| 73. | reason | a cause or logical basis |
| 74. | reasoning | logical thinking or argument |
| 75. | reflection | careful consideration or thinking |
| 76. | remark | a spoken comment or observation |
| 77. | revelation | a surprising disclosure or realization |
| 78. | sense | practical judgment or meaning |
| 79. | sentiment | an attitude or feeling |
| 80. | spark | a small beginning of an idea |
| 81. | speculation | guessing based on limited evidence |
| 82. | stance | a position on an issue |
| 83. | standpoint | a position or point of view |
| 84. | suggestion | an idea offered for consideration |
| 85. | supposition | an assumption or tentative belief |
| 86. | surmise | a guess based on slight evidence |
| 87. | take | an informal opinion or interpretation |
| 88. | takeaway | a conclusion or main idea |
| 89. | tenet | a central belief or principle |
| 90. | theory | an explanation or speculative idea |
| 91. | thesis | a main idea or argument |
| 92. | thinking | the process of using the mind |
| 93. | understanding | knowledge or grasp of meaning |
| 94. | vagary | an odd or unpredictable idea |
| 95. | verdict | a judgment or settled opinion |
| 96. | view | an opinion or way of seeing |
| 97. | vision | an imagined idea or plan |
| 98. | visualization | a mental picture or image |
| 99. | whim | a sudden passing idea |
| 100. | worry | an anxious thought or concern |